cegin a stordy'r carchar
"At the east of the chapel is a stone stair. Going down this the Prison-Store is found below in front, while at the back a passage leads to the Bakehouse and Kitchen... a neat place. There are three boilers with built in furnaces, a range with high pressure boiler behind for hot water, a new fire-clay sink, hot water tank, and cement floor." (Ruthin Prison Inspection Report, published 1906.)
Mae cegin y carchar wedi ei defnyddio i nifer o wahanol ddibenion. Fe'i disgrifir ar gynllun y carchar yn 1831 fel y "Machine House", mae'n debyg ei bod yn cynnwys mecanwaith yn gysylltiedig â'r felin draed a ddefnyddid i godi dwr i danc ar ben yr adeilad, fel mewn carchardai eraill.
Cynllun y carchar dyddiedig 1831 yn dangos y "Machine House" (Archifdy Sir Ddinbych).